Security researcher Armin Razmdjou reported that a user readable file in a known local path could be uploaded to a malicious site. This was done by manipulating the autocomplete feature in a form and user interaction with it. While the local file is not visibly uploaded through the form, its contents are made available through the Document Object Model (DOM) to script content on the attacking page, leading to information disclosure.
Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to report an out-of-bounds read and an out-of-bounds write when rendering an improperly formatted SVG graphic. This could potentially allow the attacker to read uninitialized memory.
Security researcher Paul Bandha used the used the Address Sanitizer tool to discover a use-after-free vulnerability when running specific web content with IndexedDB to create an index. This leads to a potentially exploitable crash.
Mozilla developers and community identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code.